Delivery period refers to five consecutive working days after the last trading day of the contract. These five delivery days are called the first, second, third, fourth and fifth delivery days respectively, and the fifth delivery day is the final delivery day. Shanghai Futures Exchange: The last trading day is 15 of the contract delivery month (postponed in case of legal holidays). The delivery date is 16 to 20 of the delivery month of the contract (postponed in case of legal holidays). Dalian Commodity Exchange: The last trading day of soybean 1 is the tenth trading day of the contract month, and the last delivery day is the seventh trading day after the last trading day; The last trading day of corn, palm oil and lldpe pvc is the tenth trading day of the contract month, and the last delivery day is the second trading day after the last trading day; The last trading day of Soybean No.2 is the tenth trading day of the contract month, and the final delivery date is the third trading day after the last trading day. The last trading day of soybean meal and soybean oil is the tenth trading day of the contract month, and the last delivery day is the third trading day after the last trading day; Zhengzhou Commodity Exchange: The last trading day of strong gluten wheat and hard white wheat is the penultimate trading day of the contract delivery month, and the delivery date is from the first trading day to the last trading day of the contract delivery month. The last trading day of pta futures for cotton and rapeseed oil is 10 trading day lower than the contract delivery month, and the last trading day of early indica rice futures is the penultimate trading day of the contract delivery month, and the delivery day is the first trading day of the contract delivery month. On the third Friday of the expiration month of the contract on the last trading day of the financial exchange, in case of a national legal holiday, the delivery date will be postponed, which is the same as the last trading day.